transfixer
Senior Member
trans...Just curious what you think about the new 10 speed tranny in the current GMC models.
Just traded my 2017 Sierra 1500 with 109,000 miles on it as the transmission was beginning to have issues. Bought a '23 Sierra AT4 with the 3.0 liter turbo diesel and 10 speed tranny.
A month old and I love this truck. Transmission is incredibly smooth and the 3.0 liter turbo diesel seems to have as much get up and go as my old gasser. Plus 600 miles to the tank @24 miles to the gallon vs 16 on my old gasser.
Only hoping I get more than a 100K out of the tranny before it starts acting up.
They've not been on the market long enough for us to see them at independent shops, I've heard they are already showing up at dealers with issues, we do know they will have the same torque converter failures that the 6spds have had, and those converters are manufactured differently, which is going to make it extremely difficult to remanufacture them is what we're being told